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My topic is global warming. Scientists have spent decades trying to find out what is causing global warming or even if global warming is true or not. Since there is so much research on global warming scientist then formed the Intergovernmental Panel on Climate Change or IPCC for short. One of the first things the IPCC learned is that there are many greenhouse gases that cause global warming. Mostly humans cause these green house gases in very different ways most come from the fossil fuels in cars, factories, and electricity. Which is the history for global warming and is so called "causes".